《Programming Abstractions in C》学习第48天，p114-p117，总结如下：
一、技术总结
主要通过random number介绍了随机数的相关用法，interface示例(random.h)，client program示例(craps.c)。
#include <stdio.h>
#include "genlib.h"
#include "random.h"
static bool TryToMakePoint(int point);
static int RollTwoDice(void);
void main() {
int point;
Randomize(); // 定义在自定义的random.h文件中
printf("This program plays a game of craps.\n");
point = RollTwoDice();
switch (point) {
case 7: case 11:
printf("That's a natural. You win.\n");
break;
case 2: case 3: case 12:
printf("That's craps. You lose.\n");
break;
default:
printf("Your point is %d.\n", point);
if (TryToMakePoint(point)) {
printf("You made your point. You win.\n");
} else {
printf("You rolled a seven. You lose.\n");
}
}
}
static bool TryToMakePoint(int point) {
int total;
while (TRUE) {
total = RollTwoDice();
if (total == point) return TRUE;
if (total == 7) return FALSE;
}
}
static int RollTwoDice(void) {
int d1, d2, total;
printf("Rolling the dice ...\n");
d1 = RandomInteger(1, 6); // 定义在自定义的random.h文件中
d2 = RandomInteger(1, 6);
total = d1 + d2;
printf("You rolled %d and %d -- that's %d.\n", d1, d2, total);
return total;
}
二、英语总结
1.inclusive什么意思？
答：adj. including a particular thing。当讨论涉及到范围时，我们经常会说在某两个数之间，如果包含这两个数，那么就用inclusive这个词来形容这两个数。示例：p114，The first prototype is for the function RandomInteger(low, high), which return a randomly chosen integer in the range between low and high, inclusive。
2.subject to sth语法
答：subject用法最常见的是用作noun，不过subject也可以用作adjective。subject to sth：only able to happen if sth else happen。
三、数学总结
1.区间相关概念
(1) 半开区间: half-open internal
(2) open circle：open circle
(3) 方括号：square bracket
三、参考资料
1.编程
(1)Eric S.Roberts，《Programming Abstractions in C》：https://book.douban.com/subject/2003414
2.英语
(1)Etymology Dictionary：https://www.etymonline.com
(2)Cambridage Dictionary：https://dictionary.cambridge.org文章来源：https://www.toymoban.com/news/detail-659318.html
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